Cyclometer



(No Model.)

J. G. POOL. GYGLOMETER.

N0. 362,853. PaJtentedMay 10, 1887.

UNITED STATES PATENT OFFICE.

J. GEORGE POOL, OF MOUNT CARMEL, CONNECTICUT.

CYCLOM ETER.

SPECIFICATION forming part of Letters Patent No. 362,853, dated May 10,1887.

Application filed August 23, 1886. Serial No. $11,608. (No model.)

To all whom, it may concern.-

Be it known that I, J. GEORGE POOL, of Mount Carmel, in the county ofNew Haven and State of Connecticut, have invented a new Improvement inCyclometers; and I do here by declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,

to and which said drawings constitute part of this specification, andrepresent, in-

Figure -1, a face view; Fig. 2, a rear view, the back removed, showingthe mechanism, portions broken away for fullillustration; Fig.

1 3, a vertical section of the case, showing side View of the apparatus,the center arborin see tion; Fig. 4, a transverse section through theshaft L, showing the link-connection N; Fig. 5, a partial detached sideview showing the brake, and also illustrating modifications of thecount-lever.

This invention relates to a device to be attached to a bicycle orveloeipede as a means for indicating-the distance run by the machine,

2 5 commonly called cyclometer, the object being a simple construction,in which its mechamsm is readily adapted to various diameters ofdrivlng-wheel, it being understood that the size of the driving-wheels"aries in diameter by lnches.

V 0 into one hundred teeth.

Upon the arbor a is atubular arbor, e, which carries the secondcount-wheel, f, having also one hundred teeth, and ofsubstantially thesame diameter as the first count-wheel, b. The

arbor 6 extends through the dial and carries a pointer, o. Fixed to thefirst count-wheel isa disk, g. of the same or slightly larger diameterthan the second count-wheel, and preferably standing between the twocount-wheels. This c disk has in its periphery asingle notch, h,corresponding to one tooth of the second countwheel.

E is the mile wheelthat is to say, a wheel which is adapted to revolveonce in each mile. This wheel E is arranged upon an arbor, i, whichextends through the dial and carries the milepointer l, eccentric to thearbors of the principal count-wheels, graduations being provided for themile-wheel independent of the graduations for the first and secondwheels, as seen in Fig. 1. The several arbors are sup ported in aframe-work, as seen in Fig. 3, and

in like manner for supporting this class of mechanism. The wheel E hasin its periphery fifty-three teeth.

Upon an arbor, m, parallel with the arbor i,

is a pinion, it, having seven teeth arranged to work in the fifty-threeteeth of the mile-wheel E. Fixed to'the same arbor, m, is the feedwheelF. It is from this wheel F that the feed is imparted, and the number ofteeth upon its edge must be in proportion to the circumference of thedriving-wheel, so that the milewheel shall revolve but once while themachine is traveling a mile; and that the apparatus may be readilyadjusted to different-sized driv ing-wheels the proportion of thefeed-wheel must be changeable with relation to the varying sizes of thedriving-wheel, that the same result-that is,one revolution of themile-wheel to each mile traveled-will be insured.

As the initial point from which to work, I take a fifty-inchdriving-wheel, and find that with fifty-three teeth on the feed-wheel,with its pinion having seven teeth, and the milewheel having fifty-threeteeth, one revolution of the mile-wheel for the fifty-inch drivingwheelwill be attained,and that by reducing the feed-wheel one tooth for eachinch increase in the diameter of the driving-wheel, or increasing thenumber of teeth of the feed-wheel one tooth for each one inch indiameter of the driving-wheel, will attain the same result-that is tosay, for a fifty-one-inch drivingwheel the feed-wheel must havefifty-two teeth, for a fifty-two-inch wheel the feed-wheel must havefifty-one teeth, for a forty-nineinch wheel the feed-wheel will havefifty-four teeth, and so on. The relative proportion, therefore,which Ihave described between the pinion and the gear of the mile-wheel, andwith the fiftythree teeth on the feed-wheel, as the initial point, theincrease or decrease in the size of the driving-wheel by inches will bemade by a corresponding decrease or increase of teeth in thedriving-wheel by one tooth for each inch variation in diameter of thedrivingwhecl from the said fifty-inch initial point.

Hung loosely upon the arbor m of the feed wheel is a lever, G, so as toswing concentric with the wheel F, and this lever carries a spring-pawlH, adapted to engage the teeth on the periphery of the wheel F under theswinging movement imparted to said lever G. Upon an arbor, I, atwo-armed lever, J K, is hung to swing in a plane parallel with theplane of the feed-wheel and of its lever G. The longer arm extends tothe lever G, and is provided with a stud, 1', which works in acorresponding slot, 8, in the lever G, and so that as the said arm Jswings outward and inward it will impart a corresponding swingingmovement to the lever G, the slot 8 permitting the stud r to workthereinin such movement; and the length of the slot 8 is such that themovement imparted by the arm J to the lever G will be sufficient tocause the pawl 71, engaging a tooth of the wheel F, to impart a one-stepmovement to the said wheel F, such movement being indicated in brokenlines, Fig. 2. At the upper end of the slot 8 is a transverse slot, if,turned outward and curved concentric with the axis upon which the arm-Jturns, so that when the lever G has been turned to its extreme advancedposition the stud 1* will have passed through the slot 8, and will thenenter and work in the slot it without effect upon the lever G; but uponthe return of the arm J it will return the lever G and pass down to itsnormal position in the slot 8.

Through the case is a shaft-[T1, arranged to oscillate by means of anarm, M, fixed to its outer end. This arm extends so far from the casethat when the case is fixed, say, to the wheel, so as to revolve withthe wheel, the arm will strike some fixed part of the machine once ineach revolution of the wheel, or, if fixed to the machine, arranged sothat some single point on the wheel will strike the arm M at eachrevolution, and under such operation the oscillatory movement isimparted to the shaft L. Within the case this shaft is constructed witha cam or eccentric, a, from which a link, N, extends into connectionwith the shorter arm, K, of the leverJ K, as seen in Fig. 2. The lever JK is provided with a spring, 1?, the tendency of which is to draw thelever J Kand the shaft L to their normal position or place of rest, andas seen in Fig. 2; but when the arm M is turned, as before de scribed,the shaft L will be correspondingly turned, and by its cam will draw thelink N, as indicated in broken lines, Fig, 4, and correspondingly turnthe lever J K, as seen in broken lines, Fig. 2; but so soon as the arm Mr is free the reaction of the spring P will return the parts to theirnormal position. Thus at each revolution of the wheel the arm J isthrown outward, correspondingly moving the lever G, as seen in brokenlines, Fig. 2, and under such movement the pawl I-I, engaging one of theteeth of the wheel F, will impart to that wheel one step in itsrotation, and, so continuing, at each revolution the wheel F will beturned one tooth and the wheel E receive a correspondingintermittentmovement through the pinion a working therein, and because of therelation of the teeth of the wheel F, the pinion n, and of the wheel E,the wheel E revolves once in each mile run by the machine, it beingunderstood, as before described, that before the eyclometer is appliedto the machine a wheel, F, is introduced, the teeth of which correspondto the inches in diameter of the driving-wheel.

On the center arbor a lever is hung so as to swing free and independentof the count-wheels thereon. One arm, 1%, of this lever extends besidethe wheel E, and so as to be acted upon by a cam, S, on the arbor i onthe wheel E, this cam being adapted to impart one full vibratorymovement to the lever at each revolution. A spring, T, bears upon thearm 1%, so as to hold it yieldingly against the cam S. The other arm, U,of this lever extends to a point outside the periphery of thecountwheels, and carries a spring-pawl, W, which is adapted to work intothe teeth of the first count-wheel; hence at each full vibration of thelever B U, imparted once in each mile, as before described, thecount-wheel b will be turned one tooth.

Upon the same axis as the pawl XV asecond pawl, 10, is hung, the nose ofwhich is equal in width to the width of the disk 9 and the secondcount-wheel,f, as seen in Fig. 3, so that the nose rides upon theperiphery of the disk, as seen in Fig. 2,and thus riding upon the smoothperiphery of the disk, it is prevented from engagement with the teeth ofthe second count-wheel, so thatwhilelhepawl \V is working in the teethof the first count-wheel no effeet is produced upon the secondcount-wheel;

but as the first count-wheel completes a revolution, the pawl w arrivesat the notch hin the disk 9, and there is permitted, under the action ofits spring, to fall into that notch and engage a corresponding tooth inthe second countwheel, f, and will at that timeinipart one toothmovement to the said second count-wheel; but in the next vibration thepawl w escapes from the notch h and again commences its ride over thesmooth periphery of the diskgindepeinlent of the wheel f. Supposing,therefore, the two count-wheels to have each one hundred teeth, a fullrevolution of the first count-wheel will indicate one hundred miles, atthe end of each hundred miles the second count-lever will be turned onetooth, and the full revolution 01:

the second wheel will indicate one hundred turns of the firstcount-wheel or ten thousand miles-the pointers of the mile-wheel on thedial indicating fractional parts of a mile, the pointer of the firstcount-wheel indicating single miles to the-number of a hundred, and thepointer of the second count-wheel indicating the number of hundreds ofmiles.

A stop-dog, X, is hung to work in the teeth of the count wheel orwheels, and so as to prevent accidental or backward turning of thecount-wheels, and a like stop-dog, Y, is pro vided for the feed-wheel F.

Under this construction of the cyclometer, and in which the pinion ofthe feed-wheel and the teeth of the mile-wheel bear the relation to eachother which I have described, the de: vice is applicable to machines ofvarious diameters of driving-wheels, it only being necessary that thefeed-wheel shall be according to the diameter of the wheel of themachine, as before described.

While the stop-dog may serve to arrest the accidental rotation of thesecond count-wheel, I prefer to lock that wheel so that it cannot beaccidentally rotated. and this locking device I show detached in Fig. 5for convenience of illustration.

The locking device consists of a dog hung upon a fulcrum, 2, its nose3adapted to engage the teeth of the second count-wheel under the actionof a spring, 4. The tail 5 of the dog eX- tends toward the pawl 10, andfrom this pawl 10 a finger, 6, extends beneath thetail 5 of the dog, andso that as the pawl 10 is riding upon the periphery of the disk 9 thetail 5 of the dog will be raised and the nose 3 of the dog will becorrespondingly held in a tooth of the count-wheel but so soon as thepawl w drops into the notch h of the disk g as indicated in brokenlines, Fig. 5, then the dog is free,eX'- cept as to the action of itsspring, and will permit the countdisk to turn under the action of thepawl 10,- but so soon as the pawl w escapes from the notch h then thefinger 6 of thepawl raises the tail of the dog and holds the nose in thenext tooth on that wheel, and will so continue to do until, in the nextrevolution ofthe disk 9, the notch it again permits the pawl w to dropand release the dog.

The count-lever R U may be made to act positively by constructing thearm R with a bifurcated end to embrace the cam S on the mile-wheelarbor, as seen in Fig. 5, and thus positively insure the proper returnof the count-lever after having imparted the movement to thecount-wheel.

In cases where ahundrcd miles is the extent of count required, thesecond count-wheel may be omitted, and in case a greater number of milesthan ten thousand, as described, is required, an additional disk andcount-wheel may be added, the said additional count'wheel having itspawl, the second disk, and countwheel identical with the disk g,count-wheel f, and pawl w. This duplication of the countwhecls is anarrangement too well known to require illustration.

I claim 1. In a cyclometer, the combination of the mile-wheel E, havingfifty-three teeth, the feed-wheel F, carrying a pinion, a, of seventeeth, working into the fifty-three teeth of the mile-wheel, and thesaid feed-wheel having teeth in its periphery corresponding in number tothe diameter of the driving-wheel, the

initial diameter of the driving-wheel being fifty inches and thecorresponding number of teeth in the feed-wheel being fifty-three andadapted to vary therefrom by one tooth for each successive inchvariation in the diameter of the driving-wheel, the oscillating shaftl1. having an arm extending therefrom, the said shaft provided with acam, and the arrangement of levers and pawls, substantially such asdescribed, between the cam of the said shaft and the teeth on the saidfeed-wheel, substantially as described.

2. In a cyclometer, the combination of the mile-wheel E, havingfifty-three teeth, the feed-wheel F, carrying a pinion, a, of seventeeth, working into the fifty-three teeth of the mile-wheel, and thesaid feed-wheel having teeth in its periphery corresponding in number tothe diameter of the driving-wheel, the initial diameter of thedriving-wheel being fifty inches and the'eorresponding number of teethin the feed-wheel being fifty-three and adapted to vary therefrom by onetooth for each successiveinch variation in the diameter of thedriving-wheel, mechanism, substantially such as described, to impart astep-by step rotation'to the said feed-wheel F, a cam, S, on the arborof said mile-wheel, a count-Wheel, I), and the count-lever R U, onearmcarrying a pawl, WV, working into theteeth of said count-wheel, theother arm arranged to engage the said cam on the mile-wheel, with anindicator in connection with said count-wheel,

substantially as described.

3. In a cycloineter, the combination of the niile-wheel E, havingfifty-three teeth,the feedwheel F, carrying a pinion, a, of seven teeth,working into the fifty-three teeth of the milewheel, and the saidfeed-wheel having teeth in its periphery corresponding in number to thediameter of the driving-wheel, the initial diameter ofthe drivingwheelbeing fifty inches and the corresponding number of teeth in thefeed-wheel being fifty'three and adapted to vary therefrom by one toothfor each successive inch variation in the diameter of the driving-wheel,a lever, G, hung upon the arbor of the feed-wheel, carrying a pawl, H,working in the teeth of said feed-wheel, the said lever constructed witha slot, 8, a second two-armed lever, J K, the one arm, J, carrying astud working in the said slot of the lever G, an oscillatin'g shafthaving an operating-arm eX- tending therefrom, said shaft constructedwith a cam, and a connection, N, between said cam on the oscillatingshaft L and the arm K of the said lever, substantially as described.

4. In a cyclometer, the combination of the mile-wheel E,havingfifty-three teeth, the feedvary therefrom by one tooth for eachsuccessive inch variation in the diameter of the driving-whee],mechanism, substantially such as described, to impart a siep-by-steprotation to the said feed-wheel F, a cam, S, on the arbor of saidmilewheel, a count-wheel, Z), and the count-lever R U, one arm carryinga pawlfiV, working into the teeth of said eount-whee1, the other armarranged to engagethe said cam on the mile-wheel, with a second toothedcount-wheel,f, disk 9, having a single notch, h, in its periphery, andfixed to the first conntwheel, asecond pawl, 10, hung upon the count-]ever, its nose working over both the periphery of the said disk and ofthe said second count-wheel, the said count-wheels each pro vided withindependent indicators, substantially as described.

5. In a cyclometer, the combination of the mile-Whce1E, havingfilly-three teeth,the feed- Wheel F, carrying a pinion, a, of seventeeth, Working into the fifty-three teeth of the mile wheel, and thesaid feed-Wheel having teeth in its periphery corresponding in number tothe diameter of the drivingwvhcel, the initial diameter of thedriving-wheel being fifty-three inches, and the corresponding number ofteeth in the feed-wheel being fifty-three and adapted to vary therefromby one tooth for each successive inch variation in the diameter of thedriving-wheel, mechanism, substantiallysuch as described, to impart astep-by-step rotation to the said feed-Wheel F, a cam, S, on the arherof said milewvheel, a count-wheel, b, and the count-lever R U, one armcarrying a pawl, W, working into the teeth of said count wheel, theother arm arranged to engage the said cam on the mile-wheel, with asecond toothed count-whee], j", disk having a single notch, h, in itsperiphery, and fixed to the first countwheel, a second pawl, w, hungupon the count lever, its nose working over both the periph cry of thesaid disk and of the said second countwheel, a dog hung upon a fulcrum,4, its nose adapted to engage the teeth of said second count-Wheel, andthe pawl 10, constructed with a finger, 6, arranged to Work beneath thetail 5 of the'dog, substantially as and for the purpose described.

J. GEORGE POOL.

\Vitnesses:

\VM. M. Bmrnnnc, O. CLIFFORD J mes.

